President Obama announces Gen. McChrystal resignation

MANDEL NGAN/AFP/Getty Images

US President Barack Obama, General David Petraeus, and Defense Secretary Robert Gates (R) make their way through the Colonnade for Obama to make a statement in the Rose Garden June 23, 2010 at the White House in Washington, DC. Obama announced the resignation of Afghan war commander General Stanley McChrystal and named Petraeus as his replacement.

US President Barack Obama, General David Petraeus, and Defense Secretary Robert Gates (R) make their way through the Colonnade for Obama to make a statement in the Rose Garden June 23, 2010 at the White House in Washington, DC. Obama announced the resignation of Afghan war commander General Stanley McChrystal and named Petraeus as his replacement. (MANDEL NGAN/AFP/Getty Images)

US President Barack Obama, General David Petraeus, and Defense Secretary Robert Gates (R) make their way through the Colonnade for Obama to make a statement in the Rose Garden June 23, 2010 at the White House in Washington, DC. Obama announced the resignation of Afghan war commander General Stanley McChrystal and named Petraeus as his replacement.